Re: IPv4 flag day

[Jay Acuna via NANOG <nanog () lists nanog org>]

On Tue, Jun 16, 2026 at 4:21 PM Arie Vayner via NANOG
<nanog () lists nanog org> wrote:
> [...] In my view, this is a core reason why IPv6 adoption remains low in the
> enterprise space: it requires fundamental paradigm shifts rather than a
> simple protocol update.

Yes.  And there are many issues with running IPv6 systems.
One of the major problems is there are way too many bits, and they've
created addresses
which simply cannot be typed (practically).

It is as if the designers of the protocol didn't learn from IPv4 and
did not care at all about basic needs of operators.

One of those needs is the capability to look at a System logging
console, and see
an address which can be remembered for 5 seconds and typed into a terminal
in 5 seconds.   In order to troubleshoot or diag some issue.
To identify and group traffic.  To add or remove a single host from a blocklist.

Copy and paste is not always available and not always suitable.
Neither are DNS nor reverse DNS mappings.
In a number of important ways IPv6 was fatally deficient.

I believe a flag day is out of the question.  Perhaps some day
a suitable protocol would be devised to take the place of V6.

> Thanks,
> Arie
--
-JA
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